Improvement in machines for cutting and dressing stone



4and combination of the parts that produce the which freely slidesbetween posts a a, and

miran tric..

AENr JACOB HEDRIOK, VILLIAM TASH, AND HENRY KREIDLER, OF YORK, PA.

IMPROVEMENT IN' MACHINES For To cir/ZZ whom L't71zctyconccrn:

Be it known that we, JACOB HEDRIGK, WIL- LIAM TAsH, and HENRY KREIDLER,of York, in the county of York, in the State of Pennsylvania, havejointly invented certain Improvements in Machines for Cutting andDressing Stones, and especially for dressing the faces of millstones,ofwhich the following is a specification.

rlhe object of our invention is to produce a machine for cutting stonein which the cutting-tools can have a greater variety of changes inposition with relation to the supportingframe, the driving-power, andthe stone being cut, and without any change in the position of thesupporting-frame itself than has ever before been used within ourknowledge; and it consists in the construction, arrangement,

changes and movements necessary to carry out the objects of theinvention and produce the result required. i

In the drawings, Figure l is a front view of the machine. Fig. 2 is atop plan view. Fig. 3 is a side View, and` Fig. 4 is a longitudinalsectional view.

A represents the main supporting-frame, having posts a a a, and A is aplatform or seat insertedin the top of frame A. rlhe supporting-frame Ahas at its forward or front side a bearing-beam, A2, the top of which israised a sufficient height above the bottom of the frame A to supportand guide some of the operating parts of the machine, and at the eX-treme ends of beam A2 are lugs or stops l l.

Upon the supporting-base of frame A are two posts, aa. These postsaa'have a plate7 a2, at their top ends, and made fastthereto, andthrough the center of its length is a hole to receive a temper-screw,as, and which freely turns in thehole in said plate ai. The temperscrew@with a screw-thread on its lowerend, after passing through plate a2,enters into a screw-hole in the center of a sliding beam, at, isadjusted up or down by means of the temperscrew a3, which has a collarfast to the rod parts of the screw above and resting upon plate a2, sothat by turning the temper-screw the beam a is raised or lowered, asdesired.

Standing upright upon the base of the supporting-frame A is shaft A3,which has placed upon it at proper heights pulleys A4A and A5 CUTTINGAND DRESSING STONE.

and sliding sleeve-clutch a5. Pulley A4 is the driving-pulley freelyturning upon shaft A3,

and having clutch or driving pins on the upper edge ofthe eye of thepulley Af. Sliding sleeve-clutch a5 has clutch or driving pins on itslower end and freely slides up or down on shaft A3, but does not revolvethereon, because it is prevented by having a groove cut in the eye thatfits upon a feather fast in the shaft A3,' but when the sliding sleeveis let down the clutch or driving pins on its lower side engage with theclutch or driving pins on the upper edge of the revolving pulley Af,which gives motion to and revolves shaft Anl by means of a belt or otherconvenient way'of giving such motion from the driving-power. Slidingclntch a5 is thrown into lor out of contact with pulley A* by means ofthe forked lever a, which has its fulcrum at aT on the rear post, a, offrame A. Pulley A5 is also firmly attached to said shaft A3, andcommunicates motion to the operating parts of the machine through beltA6. i

Standing upon and revolving in cross-girt as is shaft a9, having arms amon opposite or nearly opposite sides of said shaft a9. On each side ofshaft a9, and sliding upon arms klo, are sliding rods au,which carrypulleys am. |These pulleys revolve freely upon the sliding rods au, andare surrounded by belt A6, as seen in Figs. 2, 3, and 4, and are used tokeep the belt AG in proper tension'upon the drivingpulleys A5 and A7 bythe spiral spring au around arms al forcing the sliding rods from theshaft a and the pulleys au hard against the belt A, and always lkeepingit in the right strain to prevent slipping. Shaft a9 has attached nearits upper end a coil-spring, a, which causes the shaft a" and pulleysai, to be forced to bear against the belt AG. The shaft a is held at anytime in rigid position by means of the spring-catch a15 catching intoteeth am on the under side of the platform or top part of frame A, asseen in Figs. l and 4.

B B represent the frame which contains` and supports'the movingoperating parts and the acting cutting-chisels of the machine.

B B are pivoted guiding and sustaining arms, pivoted at b to the underside of frame B by means of the hand screw-rods B2. These inclinedguides and sustaining-arms B rest upon beam A2 near their forward ends,and pass between plate a2 and adjustable beam at on frame A, and areguided in their reciprocations and oscillations and prevented fromgetting out of place by the guide-pins 1 l at the extreme ends of beamA, lugs on the under side of plate c2, and pins 2 and 3 ou the upperside of said guide-arms, as when frame B, with the guide-arms B B, isforced back, the outside of arms B strike against pins 1 l, pins 2 2strike against plate c2 on its front side and prevent its furtherprogress in that direction, and when frame B is forced forward `pins 3 3will strike against the plate a2 on its rear side and stop its furtheradvance in a forward direction, while the lugs on the under side ofplate c2 prevent the arms from sliding laterally too far toward eachother, and the posts a will keep them from spreading outward beyondcontrol.

Equidistant from the center line from front to rear of the machine, andbetween the front and the platform or seat A, are erected twoperpendicular posts, which form a part of the movable frame B. Betweenthese two posts, and supported by horizontal girts b b', is an uprightshaft, B2, working in proper journalboxes in or attached to said girts bb. Near the lower end of shaft B2, and fast thereon, is pulley A7, bywhich the shaft B2 is revolved. Higher up on shaft B2, and fast thereon,is

Vgear-wheel b2, which gears into gear-wheel b on horizontal shaft b4,which is journaled in bearings on frame B, and has toothed gearwheel Cfast on its outer end and outside of the side of frame B. At the top endof shaft Blz is gear-wheel b5, gearing into gear-wheel b on horizontalshaft b7,which has journal-bearings in the upright posts of frame B attheir top ends, and extends far enough on either side of the said poststo receive hand cranks or winches B. The object of this arrangementbeing to drive the picks or chisels by hand-power, the operator sittingupon platform or seat A and forcing clutch-lever over so as to raise thesliding clutched out of contact with the driving-pulley A, and turningthe hand cranks or winches B, motion will be communicated to thechisels, and in small machines for dressing and picking millstones thiswill generally be the means of operating the picks or chisels.

Horizontal shafts bT are` constructed and arranged so as to slidelongitudinally, and when reeiprocated in one direction gear-wheel b'i isthrown out of gear with gear-wheel b5, and is held in this position orin gear with wheel b5 by means of the forked lever bS engaging ingrooves b in shaft bl, and is retained in such position by spiral springb1 around lever bs.

As above described, revolving motion is given to toothed wheel O onshaft b either through driving-pulleys AL A5, belt A, pulley A7 on shaftB2, or, when operated by hand, through the gear-wheel on horizontalshaft bl, upright shaft B2, tokhorizontal shaft b'L upon which toothedwheel C is made fast. Toothed wheel C gears into and drives wheel C onhorizontal shaft D, which is supported upon and has and revolves injournal-boxes on arms that forni a part of frame B. Vheel C becomes aleader and gears into and revolves intermediate wheel, C2, on a shortaxle that is secured to frame B. This intermediate wheel gears into andrevolves wheel C3, which is loosely fitted upon the end of thehorizontal upper feeding screw-rod, E, which goes transversely acrossthe entiremachine.k Leaderwheel C2 also gears into and revolvesintermediate gear-wheel, c, which in turn gears into and drives wheelc', and wheel c gears into and revolves wheel 02, which is looselyfitted upon one end of the horizontal lower feeding screw-rod, E', whichalso goes transversely across the entire front of the machine anddirectly underneath feeding screw rod E. Both feed-rods revolve injournal-boxes secured to the front of frame B. This system ofgear-wheels is so arranged and connected together that they cause theupper and lower feeding-rods, E and E, to revolve in the same direction,and so that the pitch of the screwthread will cause whatever isconnected to and driven by said feeding screw-rods to be fed along atthe same speed by either feed-rod, and in the same direction. p

On the opposite side ofthe machine from the driving-gear above describedis an upright shaft, D', which revolves in journal-boxes secured toframe B. This upright shaft D has gear-wheels d and d firmly securedthereto. NVheel (Z gears into gear-wheel (l2, that is made fast to theupper horizontal feeding screw-rod E, and wheel d gears into gear-wheeld3, that is fast on the lower horizontal feeding screwrod E', by whicharrangement of gear-wheels the two screw feeding rods are connectedtogether and their movements coincident. Upon the upper end of uprightshaft D is attached a hand-wheel, D4, and by means of which shaft Dandscrew feeding-rods E and E may be revolved. On the ends of the feedingscrewrods E and E', that have wheels C3 and c2 loosely fitted thereon,and outside of said wheels, are sliding sleeve-clutches d5 and d6, whichslide longitudinally upon the screwfeeding rods, but are prevented fromturning on said rods by feathers inserted longitudinally in the rods andprojecting beyond the surface of the rods, and fitting in grooves in thesleeve-clutches. On the inner or that side toward the gear-wheels C: andc2 of sliding sleeve-clutches are driving-pins that engage withcorresponding driving-pins on the outside of wheels C3 and c2.

c is a double-forked lever pivoted centrally at e to frame B, the forkedends fitting in grooves in the sliding sleeve-clutches d5 and d6.

c2 is an extension or continuation of lever c, extending upward, and isgrasped by the horizontal reciprocating rod f. Upon this rod f are twosliding and adjustable gagestops f f 2. Arranged in suitableposition,and firmly held at its ends in proper place on the front of frame B, isguide-rodf3. The gagestops f and f2 have a hole entirely through 'IELQGv 5 cut a new pathway across the top or face of the stone, at the sametime `regulating the force of the blow upon or the depth to be eut bythe chisels or picks by adj usting the hand screw-rod K as may berequired. Frame B is adjusted as to height at either side by means ofthe upright screw-rods B2, by which adjustment the chisels or picks maycut deeper in the stone at onel side of the machine than at the other,or they may be raised out of contact with the stone entirely by turningdown the screw-rod B2 far enough to accomplish such result. The cliiselsor picks are also adjustable on their shaft to project below the shaftmore or less, as desired.

Ne do not confine ourselves to the exact construction of the parts indetail as herein described, as there are many ways of constructing thesame Without departing from the principle of construction and operationthat We have shown and described-as, for instance, We have describedonly two chisel or pick shafts; but it is evident that any number ofshafts and chisels or picks may be used, or

`belts and pulleys may be substituted for gear- Wheels, 'or othermechanical means used for moving the frame B-to different positions thanthe toothed rack arms and pinions, and yet be the same invention.

Having thus described our invention, what We claim, and desire to secureby Letters Patent, isj l. The combination of shaft a9, arms am, carryingsliding axles a, pulleys a, and springs a, in the manner and for thepurpose herein described.

2. The driving and intermediate gear-wheels, C, C', C2, G3, c, c, and c,in combination With the clutch-lever c, slidingclutches d5 and d,feeding-screws E and E', shaft DI, gear-Wheels d, d', d2, and d3,sliding rod f, with its adjustable gage-stops f2, sliding frame F, rodf, and springs f 5, constructed and arranged tooper-v ate substantiallyiu the manner and for Vthe purpose set forth.

3. The driving` and intermediate gear-wheels, C, O', C2, C3, c, c, andc2, above enumerated, shaft D, sliding and revolving Wiper-Wheel G,having Wipersg, in combination With the chisel or pick shafts H, havingadjustable liftingarms I, constructed and arranged to operatesubstantially in the manner shown.

4.. The chisel or pick shafts H, cylinderadjusting nuts j, adjustablestops J2, and springs 3, when constructed and arranged in the mannershown.

5. The hand screw-rod K, base-plate fi", springs i2, in combination withthe adjustable lifter-arms I, and chisel or pick shafts H, in the mannerand for the purpose described.

6. The slotted guide-plate J, in combination with the base-plate i* andlifter-arms I, when constructed and arranged to operate in the mannerand for the purpose set forth.

7. The adjustable picks or chisels secured to their shafts H by'means ofthe dovetail rib o on the pick and the dovetail slot o in the shafts H,and held by the holding-screw h, in the manner shown.

8. rlhe hand -Wheel shafts M, pinions m', rack-arms L, and guideWays L',in combination with the frame B,When the parts are constructed andarranged to operate in the manner and for the purpose substantially asdescribed.

9. The reciprocating, sliding, and supporting arms B', when constructedand arranged to operate in the manner described.

l0. The temper screw-rod a3, sliding beam a4, and plate a?, incombination with the sliding and supporting arms B,when constructed andarranged in the manner and for the purpose described.

1l. The hand screw-rods B2, in combination with the supporting-arms B',arranged to operate in the manner described.

l2. The stone cuttino` and stone -dressin machine herein described, whenthe several parts are combined and larranged to operate in the mannerand for the purpose substantiall y as shown.

JACOB HEDRICK. VILLIAM TASH. HENRY KREUDLER.

l/Vitnesses:

H. SUNDHEIM, LEBREOHT TREAGER.

